peilib.c

来自「EFI BIOS是Intel提出的下一代的BIOS标准。这里上传的Edk源代码是」· C语言 代码 · 共 182 行

/*++

Copyright (c) 2004 - 2006, Intel Corporation                                                         
All rights reserved. This program and the accompanying materials                          
are licensed and made available under the terms and conditions of the BSD License         
which accompanies this distribution.  The full text of the license may be found at        
http://opensource.org/licenses/bsd-license.php                                            
                                                                                          
THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,                     
WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.             

Module Name:

  PeiLib.c

Abstract:

  PEI Library Functions
 
--*/

#include "TianoCommon.h"
#include "PeiHob.h"
#include "Pei.h"

VOID
PeiCopyMem (
  IN VOID   *Destination,
  IN VOID   *Source,
  IN UINTN  Length
  );

VOID
ZeroMem (
  IN VOID   *Buffer,
  IN UINTN  Size
  )
/*++

Routine Description:

  Set Buffer to zero for Size bytes.

Arguments:

  Buffer  - Memory to set.

  Size    - Number of bytes to set

Returns:

  None

--*/
{
  INT8  *Ptr;

  Ptr = Buffer;
  while (Size--) {
    *(Ptr++) = 0;
  }
}

VOID
PeiCopyMem (
  IN VOID   *Destination,
  IN VOID   *Source,
  IN UINTN  Length
  )
/*++

Routine Description:

  Copy Length bytes from Source to Destination.

Arguments:

  Destination - Target of copy

  Source      - Place to copy from

  Length      - Number of bytes to copy

Returns:

  None

--*/
{
  CHAR8 *Destination8;
  CHAR8 *Source8;

  Destination8  = Destination;
  Source8       = Source;
  if (((Source8 + Length) <= Destination8) || (Source8 >= Destination8)) {
    while (Length--) {
      *(Destination8++) = *(Source8++);
    }
  } else {
    while (Length--) {
      *(Destination8 + Length) = *(Source8 + Length);
    }
  }
}

VOID
CopyMem (
  IN VOID   *Destination,
  IN VOID   *Source,
  IN UINTN  Length
  )
/*++

Routine Description:

  Copy Length bytes from Source to Destination.

Arguments:

  Destination - Target of copy

  Source      - Place to copy from

  Length      - Number of bytes to copy

Returns:

  None

--*/
{
  CHAR8 *Destination8;
  CHAR8 *Source8;

  Destination8  = Destination;
  Source8       = Source;
  if (((Source8 + Length) <= Destination8) || (Source8 >= Destination8)) {
    while (Length--) {
      *(Destination8++) = *(Source8++);
    }
  } else {
    while (Length--) {
      *(Destination8 + Length) = *(Source8 + Length);
    }
  }
}

BOOLEAN
CompareGuid (
  IN EFI_GUID     *Guid1,
  IN EFI_GUID     *Guid2
  )
/*++

Routine Description:

  Compares two GUIDs

Arguments:

  Guid1 - guid to compare
  Guid2 - guid to compare

Returns:
  = TRUE  if Guid1 == Guid2
  = FALSE if Guid1 != Guid2 

--*/
{
  if ((((INT32 *) Guid1)[0] - ((INT32 *) Guid2)[0]) == 0) {
    if ((((INT32 *) Guid1)[1] - ((INT32 *) Guid2)[1]) == 0) {
      if ((((INT32 *) Guid1)[2] - ((INT32 *) Guid2)[2]) == 0) {
        if ((((INT32 *) Guid1)[3] - ((INT32 *) Guid2)[3]) == 0) {
          return TRUE;
        }
      }
    }
  }

  return FALSE;
}